| Sold | Grade | Monthly Average |
| Dec 2025 | 2.5 | $140.00 |
| Feb 2026 | 2.0 | $99.00 |
| Jun 2017 | 5.0 | $69.99 |
| Jan 2015 | 3.5 | $45.25 |
| Sep 2022 | 3.0 | $96.00 |
| Apr 2021 | 3.0 | $62.00 |
| May 2023 | 2.5 | $95.00 |
| Sep 2017 | 2.5 | $40.00 |
| Nov 2017 | 2.0 | $35.00 |
| Feb 2012 | 2.0 | $38.00 |
| Feb 2021 | 1.5 | $33.00 |
| May 2015 | 1.0 | $18.65 |
| Mar 2015 | 0.5 | $8.70 |